Ключевые слова: activity, box, communications, damaging, deep, dig, earthmoving, equipment, excavating, excavation, excavator, experts, insulation, investment, knowhow, laborer, machinery, maintenance, movement, new, outdoors, pipe, pipeline, piping, prevent, reconstruction, repair, resources, road, safety, sand, sheeting, shielding, shoring, site, soil, strip, struts, support, surface, system, technology, trench, under, underground, utilities, water, work,